Quote Originally Posted by DB_Hunter View Post
I don't think Itachi will dissapear if Kabuto releases Edo Tensei. If he could then Kabuto would have done that already and re-summoned him under his control.

Itachi will go when he is 'at peace' and Kabuto can't do anything about it.
Kabuto didn`t released it because then every other zombie would be released as well.